1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zysi [14]
3 years ago
11

What speed must an electron have if its momentum is to be the same as that of an x-ray photon with a wavelength of 0.30?

Physics
1 answer:
lorasvet [3.4K]3 years ago
8 0

The momentum of the x-ray photon is p = h/lambda . Lambda is the wavelength (0.30nm=3x10^(-9)m) and h is Planck's constant,(h=6.62607004 × 10-34<span> m2 kg / s).The momentum is: 2.2 x 10^(-25).</span>

The momentum can be calculated also as: p=mv, where m is the mass of the electron and v is the speed.

So v=p/m,p is known,and also the mass of the electron (m=9.10938356 × 10-31<span> kilograms).</span>

v=2.2 x 10^(-25)/9.10938356 × 10-31<span> kilograms=0.24 x 10^6 m/s</span>

You might be interested in
Si se deja caer una piedra desde un helicóptero en reposo, entonces al cabo de 20 s cual será la rapidez y la distancia recorrid
ahrayia [7]

Answer:

La piedra alcanza una rapidez de 196.14 metros por segundo y una distancia recorrida de 1961.4 metros en 20 segundos.

Explanation:

Si se excluye los efectos del arrastre por la viscosidad del aire, la piedra experimenta un movimiento de caída libre, es decir, que la piedra es acelerada por la gravedad terrestre. La distancia recorrida y la rapidez final de la piedra pueden obtenerse con la ayuda de las siguientes ecuaciones cinemáticas:

v = v_{o} + g\cdot t

y - y_{o} = v_{o}\cdot t + \frac{1}{2}\cdot g \cdot t^{2}

Donde:

v, v_{o} - Rapideces final e inicial de la piedra, medidas en metros por segundo.

t - Tiempo, medido en segundos.

g - Aceleración gravitacional, medida en metros por segundo al cuadrado.

y. y_{o} - Posiciones final e inicial de la piedra, medidos en metros.

Si v_{o} = 0\,\frac{m}{s}, g = -9.807\,\frac{m}{s^{2}}, y_{o} = 0\,m, entonces:

v = 0\,\frac{m}{s} +\left(-9.807\,\frac{m}{s^{2}} \right) \cdot (20\,s)

v = -196.14\,\frac{m}{s}

y-y_{o} = \left(0\,\frac{m}{s} \right)\cdot (20\,s) + \frac{1}{2}\cdot \left(-9.807\,\frac{m}{s^{2}} \right) \cdot (20\,s)^{2}

y-y_{o} = -1961.4\,m

La piedra alcanza una rapidez de 196.14 metros por segundo y una distancia recorrida de 1961.4 metros en 20 segundos.

4 0
3 years ago
Two velocity vectors are added: one of magnitude 2.0 m/s and one of magnitude 4.0 m/s. Not knowing the respective directions, we
grigory [225]

Answer:

4.47

Explanation:

Given data

vector 1 = 2m/s

vector 2= 4 m/s

The expression for the magnitude of two vectors is

|a| = √v1^2+ v2^2

substitute

|a| = √2^2+ 4^2

|a| = √4+ 16

|a| = √20

|a| = 4.47

Hence the magnitude of the two vectors is 4.47

5 0
3 years ago
1.D 2.A 3.A 4.im not sure please help 5.false One light bulb in a string of lights goes out. This causes all of the other lights
Amiraneli [1.4K]
Welll ... if you read the question, you'll see what a jumbled mess you actually
posted, but I think I can pull enough out of it to give you some answers.

<span>One light bulb in a string of lights goes out. This causes all of the
other lights in the string to also go out. The entire string of lights
must be one series circuit.

2.  When a switch is turned from the off to the on position,
an open circuit is changed to a closed circuit.

3.Early telephone poles had wires that connected inside bell-shaped
glass enclosures like the ones shown below.  (nothing is shown below)
several bell-shaped glass enclosures
These glass enclosures helped to keep the electric current from moving
outside the circuit of wires. The glass enclosures were used as insulators.

4.Use Ohm’s Law to determine the resistance in a circuit if the
voltage is 12.0 volts and the current is 4.0 amps.

Ohms law:        Resistance = (voltage) / (current)

                                             = (12.0 v) / (4.0 amp)

                                             =      3 ohms .

5.  "In a closed circuit, the current only flows from the power source
to an electrical device such as a lamp."

This statement is false.  The current eventually has to get back
to the power source.  If it doesn't then there's no 'circuit', and
nothing works.  That's a big part of the reason why the plug
has 2 prongs on it, and the cord from the plug to the lamp
has 2 wires in it. </span>
6 0
3 years ago
Consider the binding energy of two stable nuclei, one with 60 nucleons and one with 200 nucleons. a. Is the total binding energy
sashaice [31]

Answer:

The total binding energy of the nucleus with 200 nucleons more than the total binding energy of the nucleus with 60 nucleons

Explanation:

Binding energy can be given by the formula:

Binding energy = Binding energy per nucleon * Number of nucleons

This means that if the binding energy per nucleon = x MeV

Where x is a positive real number

The nucleus with 60 nucleons will have Binding energy = 60x MeV

The nucleus with 200 nucleons will have binding energy = 200x MeV

For a +ve x, 200x > 60x

4 0
4 years ago
When something hits a table, why are different sounds produced?
Mandarinka [93]

Answer:

depends on the object, but the sound waves come from the impact of the object hitting the table and the tables thiness

Explanation:

3 0
3 years ago
Other questions:
  • The term pressure most nearly refers to which of the following?
    11·2 answers
  • The _________ principle states that the net electrical force on a specific charge is equal to the sum of the vector components o
    10·2 answers
  • If you mix equal amounts of cyan pigments and magenta pigments on a sheet of white paper, what color will you see on the paper?
    14·1 answer
  • Please answer me my question​
    5·1 answer
  • Which bolt would experience the greater torque?<br> Α.) Α<br> b.) B <br> c.) both are the same
    8·2 answers
  • A ball of 12 kg is attached to a string of 0.8 meter spun at 4
    11·1 answer
  • 2+2 can someone plz tell me the pros and cons of ending life right here and now?
    13·2 answers
  • A travelling disturbance that carries energy through matter or space.
    9·1 answer
  • A 10 kg cart is attached to a rope that forces the cart to travel along a circular path. The rope has a length of 2.7 meters and
    7·1 answer
  • You have to make it balanced.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!